ACPI-related kernel panic

Yesterday's changes to acpi.c are giving me page fault in kernel
mode panics.
This is taken from my normal dmesg:
acpi0: <VIA694 AWRDACPI> on motherboard
installed MI handler for int 9
acpi0: Power Button (fixed)
cpu0: <ACPI CPU (3 Cx states)> on acpi0
The panic occurs just after the 'Power Button' line appears.
I see that acpi has some debugging code included. Would it
be helpful for me to recompile with debugging turned on?
Would I just use a -DACPI_DEBUGGER flag for the compile?
Thanks.